Magazine-pistol.



No. 672,300. Patented Apr. I6, I901. w. J. TURNBULL.

MAGAZINE PISTOL.

(Application filed June 11, 1900.) (No Model.)

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WALTER J. TURNBULL, OF NEW ORLEANS, LOUISIANA.

MAGAZINE-PISTOL.

SPECIFICATION forming part of Letters Patent No. 672,300, dated April16, 1901.

Application filed June 11,1900.

To all whmn it may concern: 7

Beit known that LWALTER J. TURNBULL,a Q citizen of the United States,and a resident of New Orleans, in the parish of Orleans and State ofLouisiana, have invented a new and Improved Firearm, of which thefollowing is a full, clear, and exact description.

My invention relates to that class of firearms with which a magazine orcartridge-belt is employed; and the purpose of the invention is toprovide means which will enable the cartridges to be fed in an accurateand expeditious manner by the same device which operates the hammer andalso to employ the same device for effecting a positive lock for thefeed mechanism just before and during the time the hammer acts upon acartridge and also to so construct the device operating the hammer andcartridge-feed that a portion of the device will always be in positiveengagement and controlling contact with the feed mechanism.

The invention consists in the novel construction and combination of theseveral parts, as will be hereinafter fully set forth, and pointed outin the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a longitudinal vertical section through a pistolhaving theimprovement applied. Fig. 2 is a vertical section on the line 2 2 ofFig. 1. Fig. 3 is a view of the feed mechanism and the device foroperating the same, the parts being drawn on an enlarged scale. Fig. 4is a section through the feed mechanism and an edge view of the devicewhich operates the same, and Fig. 5 is a section taken on the line 5 5of Fig. 1.

A represents the stock of a pistol, which stock is hollow, and the stockis provided with a stationary vertical front wall 10, which forms a partof the casing or frame 11 of the arm, and the other section 12 of thestock, which closes against the fixed section 10, is connected by ahinge 13 with the upper breech portion of the barrel 14, which barrel issupported in the frame or casing 11 in any desired way. The frame orcasing is provided with a chamber 15, the main open end of which isopposite a trigger-guard 17, and the Serial No. 19,891. (No model.)

chamber 15 is provided with an opening 16 in its rear wall, wherebycommunication is obtained with the interior of the stock A.

A hammer B is located in the movable portion or section 12 of the stockA. This hammer may be of any suitable material, but usually a springmaterial is employed, and the body of the hammer is more or lesstriangular; but its head portion 20 is curved upward and forward andterminates in a firing-pin 21. The body portion of the hammer islikewise provided with an upwardly and forwardly extending breast 21which extends into the chamber 15 of the frame or casing 11 through theopening 16 therein, as is best shown in Fig. 1. The loop or shankportion 22 of the hammer particularly is of a spring material, and thisportion of the ham-, mer is bolted or otherwise attached to the innersurface of the movable section 12 of the stock A, as is also shown inFig. 1. The hammer may be prevented from acting at any time by theapplication of a safety-lock B, and this look may be of any desiredconstruction, that shown in the drawings being an arm a, held to slideat the back of the grip or stock, having a lower hinged and cappedsection a, which passes through an elongated opening or, in the stockand through a registering slot 0, in the lower or body portion of thehammer B, as shown in Fig. 1, and at the upper end of the arm a a loop24 is placed at an angle to the arm, as shown in Fig. 5. This looppasses through a second elongated opening a in the stock, and thecontracted portion of the body of the hammer passes through the loop.Thus if the arm a is forced upward the body of the hammer will be heldin a rearward position and its pin cannot strike a cartridge; but whenthe arm a is in its lower position the hammer is free to act. Thefiring-pin 21 of the hammer is immediately opposite a pin-receivingopening 19, which is produced in a partition 18, extending from side toside of the stock at its upper portion, as is also shown in Fig. 1.

A single device is employed to operate the feed mechanism D and hammer Band to serve as a trigger. This device consists of a wheel 0, having aseries of cam-teeth 25 formed peripherally thereon, one surface of eachcam-tooth being usually convexed and 2 erasoo the opposing surfacestraight. Four of such teeth are shown in the drawings; but I do notlimit myself to any specific number. This cam-wheel O is mounted on apin 25, and this pin extends from side to side of the chamber 15 in theframe or casing 11, and the camwheel is so placed in said chamber 15that one of said teeth 25 will at all times be present in the spacebetween the chamber 15 and the trigger-guard 17. This projecting toothis used in the same way as a trigger.

The feed mechanism D, in connection with which the cam-wheel O isemployed, consists of a cylinder 26, having a series of spiral groovesor slots 27 therein, and this cylinder is preferably tubular. The endsof the spiral grooves 27 may be but slightly curved; but their centralportions are decidedly so shaped. A rod 28 is attached to one end of thecylinder 26, and a star-wheel 29 is connected with the other end of thecylinder, as shown in Fig. 4, and said star-wheel is pro- Q vided with atrunnion 30.

the frame or casing 11, while the trunnion 30 is mounted to turn in thetransverse partition 18 in the stock or butt of the arm. When the feedmechanism is so mounted, the cylinder 26 is within the chamber 15 and.the star-wheel 29 is within the stock or butt between the barrel and thepartition 18.

The cam-wheel O is so placed within the chamber 15 that while a tooth isacting on the hammer B, and even While a tooth is out of engagement withthe hammer, another tooth will be within a groove in the cylinder of thefeed mechanism. In fact, there is always a tooth in a slot or groove ofthe cylinder 26, since one tooth never leaves a slot or groove untilanother has entered an adjoining slot or groove. In this manner andunder this construction the cylinder is positively locked at all times,notwithstanding that the action of the teeth of the cam-wheel in passingthrough the slots or grooves 27 tends to revolve the cylinder to adesirable extent at predetermined intervals.

The cartridges F are placed in suitable receptacles E, connectedtogether to form a chain or belt, and the casings of the uppercartridges enter the spaces at the upper portion of the star-wheel 29,and as the star-wheel is turned by the movement of the cylinder 26 thechain of cartridges is moved also. The uppermost cartridge in the chain,as shown in Fig. 1, is so placed that when the charge is exploded thebullet or projectile will pass directly into thebarrel of the weapon.

In Fig. 1 the cam-wheel O is shown in a position to just release thehammer and effect a firing of the charge, and one of the teeth is shownin the forward end portion of the groove, while the tooth which is torelease itself from the hammer is shown as just entering a second groovein the cylinder, and. a

third tooth is shown extending out to be utilized as a trigger and thefourth tooth as being in position to engage with the breast of thehammer to produce another discharge as soon as the trigger-tooth isdrawn rearward. Just after firing or immediately after the release ofthe hammer the tooth which enters the cylinder 26 will turn the cylindersufliciently to cause the chain of cartridges to move, and thedischarged shell will be carried to one side of the star-wheel 29 and aloaded shell will be brought to the upper pocket in the starwheel andimmediately at the breech of the barrel.

During the act of firing the explosion does not exert a tendency tothrow the barrel up, but the force of the explosion is in a horizontalplane and directly against the grip. As stated, the grip or stock is soconstructed that it can be opened at the breech quickly, and the chainor belt of shells can be instantly withdrawn and replaced with one fullycharged.

E are prevented from coming together by a partition 81, which isattached to the forward wall 10 of the grip or stock.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A firearm provided with a spring-actw ated hammerhaving a forwardly-extending breast, a cartridge-feed mechanism providedwith channels, a wheel formed with cam-teeth arranged to successivelyengage with said breast, which teeth also successively enter thechannels in the feed mechanism, a tooth of said wheel being always inlooking and actuating contact with a wall of a channel of the feedmechanism, whereby to turn said mechanism to bring a fresh cartridge ina firing position and lock the mechanism against other actuatinginfluences.

2. In a firearm, the combination, with a cartridge-feedmechanism,consisting of a cylinder mounted to revolve and provided withcircumferentially-arranged spiral grooves or slots, and acartridge-Snpporting device connected with the cylinder, of a wheelformed with cam-teeth, which teeth enter the grooves or slots in thecylinder, one tooth entering a groove before a preceding tooth leaves ag 1 The vertical portions of the chain of cartridges In mounting thefeed mechanism the rod 28 is held to turn in the forward portion ofgroove in the cylinder, whereby to rotate the cylinder and provide apositive lock therefor during the firing operation.

In firearms, the combination,with a casing, a feed mechanism mounted torevolve in said casing, which mechanism consists of a cylinder havingcircumferentially-arranged spiral grooves or slots, and a support for acartridge-carrying belt or chain connected with the said cylinder, and aspring-actuated hammer a portion whereof extends adjacent to the feedmechanism, of a wheel mounted to revolve in the casing and formed with aseries of cam-teeth, said teeth being adapted to successively enter thegrooves in the cylinder for the purpose of revoiving the same, one toothentering a groove in the cylinder before a preceding tooth leaves it,the entering tooth being in trip and releasing engage- WALTER TURNBULL'5 ment with the hammer, for the purpose speci- Witnesses:

fied.

J. FRED. AOKER, EVERARD BOLTON MARSHALL.

name to this specification in the presence of two subscribing Witnesses.

In testimony whereof I have signed my

